Heart rate monitor



FIG. 1 is a top plan view of a heart rate monitor showing our newdesign;

FIG. 2 is another top plan view thereof taken from the opposite side ofFIG. 1;

FIG. 3 is a perspective view of the heart rate monitor shown attached toa hand; and,

FIG. 4 is another perspective view thereof taken from the opposite sideof FIG. 3.

The heavy broken lines shown on the surfaces of the claimed designrepresent stitching.

The broken line showing of a hand is for illustrative purposes only andforms no part of the claimed design

The ornamental design for a heart rate monitor, as shown and described. 